Pipe releasing means



Feb. 19, 1952 c. R. EDWARDS PIPE RELEASING MEANS 4 Sheets-Sheet l Original Filed May l5, 1940 Cnneuss E. Eowmaos, l1' .3. A

Feb. 19, 1952 4; R, EDWARDS 2,586,015

PIPE RELEASING MEANS Original Filed May 13, 1940 4 Sheets-Sheet 2 l4oz CHmzLss R. EDWARDS,

Feb. 19, 1952 c. R. EDWARDS PIPE RELEASING MEANS 4 Sheets-Sheet 5' Original Filed May 13, 1940 Affili! Cuneuss E. Eowmeos,

Feb. 19, 1952 C, R EDWARDS 2,586,015

PIPE RELEASING MEANS Original Filed May l5, 1940 4 Sheets-Sheet 4 5 Cannes R. Env/naps,

Patented Feb. 19, 1952 PIPE RELEASING MEANS Charles R. Edwards, Houston, Tex.; Francesl Robertha Edwardsuexecutrix of said Charles Ross Edwards, deceased Original application May 13, 1940,` Serial No. 334,947. Divided and this application April 27,

' 1945, Serial No. 590,682

This invention relates tonew and useful improvements in means for recovering elements from well bores.

The former practice has been to attempt to remove the lodged or stuck portion of the drill pipe, which is commonly referred to as the iish, by grappling the pipe and pulling on the same with very powerful machinery, which oftenV seriously damages the pipe by over straining the upper portion of the pipe `until the pipe is `broken near the surface. Such breaking ofthe pipe causes the elastic stretch in that portion of pipe below to snap the lower portion of pipe downwardly with great force and most generally corkscrews this pipe and bends it over in the cave-outs and cavities, thereby damaging the same. After this happens, cutters, shooting,

in an attempt to recover the pipe. The long sections of pipe are connected together by threaded collars or threaded tool joints. Sometimes the top of the lodged portion of pipe has been rotated to the left to affect disconnection of one of the many threaded joints, but when this is done, there is no way of determining which joint will be unscrewed. A joint `at the top of the well, or only a few hundred'feet from the surface of the ground will be brokenrout, because ordinarily the lower joints are made tighter due to the bit drag on said joints during theA drilling operation. For this reason, merely rotating the pipe to unscrew the joints is notv successful since it leavesthe major portion of the pipe .in the bore.

There are so many different conditions which may arise to make the removal of this lodged pipe diiiicult that no `one device, now in use, in applicants opinion may successfullyl take care of all of these conditions. Up to the present time, there has been no method which will efficiently and positively remove or sh out pipe, or other elements, from the well bore, regardless of the position of the pipe and regardless of the particular conditions which-caused the necessity for the fishing job or of the particular conditions encountered during the attempt to remove said plpe.

It is therefore, one object of `this invention to,

provide an improved means for recovering and removing pipe, tubing, casing and other objects` which contemplates a plurality of. combined def,

9 Claims. (Cl. 2575-28) lv-vices.

` elevation, showing how a tool may be run down.

1;,.- conditions.

one or more safety -joints with one or more circulation breakers so that at least a section of stuck pipe may be removed under almost any In particular, it is cntemplated, where the safety joints are combined with circulation breakers, the circulation breakers will be placed below the safety joints.

Another object of the invention is to provide an improved circulation device for reestablishing circulation around the walls of a string of pipe,

or the like, in which it is connected, whereby cir-` culation may be established when the portion of A further object of the invention is to provide an improved circulation device for reestablishing circulation through the wall of a string of pipe into which it is connected, and in which the in- -side diameter is not restricted so as to prevent the passage of tools and other objects that will` pass through the string of pipe.

A construction designed to carry out the in- A venton will be hereinafter described, together with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings, in which an example of the invention is shown and wherein:

Fig. 1 is an enlarged, vertical sectional view, showing a circulation breaker in its inoperative position.

Fig. 2 is a view similar to Fig. 1, showing the circulation breaker of Fig. 1 in its operativ position. e

Fig. 3 is a horizontal cross-sectional View taken on the line 3 3 of Fig. 1,

Fig. 4 is a horizontal cross-sectional view taken on the line 4-4 of Fig. 1,

Fig. 5 is a horizontal cross-sectional View taken on the line 5-5 of Fig. 2,

Fig. 6 is a view, partly in section and partly in through the device,

Fig. 7 is a view similar to Fig. 6, showing how a tool may be pulled up through the device,

Fig. 8 is a vertical sectional view, showing the uid agitating means of the housing,

Fig. 9 isa vertical, sectional view of another.

form of circulation device,

Fig. 10 is a view similar to Fig. 9, showing said circulation device in its open position,

Fig. 11 is a horizontal cross-sectional viewtaken on line I I-ll ofFig. l,

For example, I contemplate combining Fig. 12 is an enlarged vertical, sectional view, showing a safety joint,

Fig. 13 is a view similar to Fig. l2, showing the safety joint of Fig. 12 in its unlocked position,

Fig. 14 is a horizontal cross-sectional view taken on line |4-I4of Fig. 12,

Fig. 15 is a horizontal cross-sectional view taken on line l-I5 of Fig. 12,

Fig. 16 is a horizontal cross-sectional viewtaken on line Iii-I6 of Fig. 12.

Fig. 17 is an elevation showing a series of circulation breakers and safety joints in a string of pipe.

In the drawings, Figs. 1-16 show various means and combinations whereby a stuck pipemay be removed from the bore of a well. There has been shown selectively operated safety joints in Figs. 12 to 16 which may be operated from the surface of the well. These safety joints are placed at intervals in the string of drill pipe and the lock on each safety joint may be selectively unlocked. For example, the lowermost lock could be operated from the surface to unlock, and if it would notA rotate soy as to disconnect the stuck pipe, then the next higher selective safety joint couldA be unlocked so as to operate the next safety joint; and so on up the string of tubes until a safety joint was reached which could be both unlocked andreleased. These safety joints will be here inafter described.

There is provided for such oil wells, as well as for other wells such as brine, gas or water wells, Circulation Breakers for use in reestablishing circulation by short stages from the top of the sticking material on down to the bottom of the stuck string of drill pipe or tubing. These circulation breakers may also often be advantageously located immediately-below' a safety joint, the purpose being that so located, the safety joint just immediately above the breaker can then be released when it is found that the reestablishment of circulation cannot release the stuck string down to some lower joint or to the bottom of the stuck string. It will be understood that 1t is always very desirable to maintain the inside diameter of any inserted device in any string of pipe, or of tubing, at a uniform diameter not smaller than the smallest inside diameter of such pipe or tubing; or at the very least not to vary such diameters to such an extent as to interfere with the ordinary withdrawal of core 'barrels and other devices that may be run-in drill -stems or with the pump parts that may be desired' to operate and run through tubing. It is to be understood that the present safety joints and circulation breakers will not interfere with such operations of running other devices inside the strings of pipe, or of tubing, that may become stuck. At times when there are circulation breakers in the string of pipe or tubing, and even when circulation has been reestablished, it will be found that the stuck string cannot be released because the circulation may have channeled around through a crevice or up one side.

Safety joint In Figs. 12 to 16, there is shown an example of one form of safety joint. The numeral 33 designatesA a housing or an elongated hollow sleeve,

which is internally screw-threaded at its upper end 34 to receive the pin 405 of Figs. 1 and 2 or, as illustrated in Figs. 12 and 13 a tool joint pin 3 4 on a pipe section. The lower end of housing 33 is internally screw-threadedl with a square or acme type thread 35 of coarse pitch and steepV lead. Also the housing 33, below the lower coarse threads 35, is provided with a cylindrical camshaped ratchet 33 having a tooth or stop 33 on its lower annular face, as is indicated in Figs. l2 and 13. The object of this is to prevent further forward rotation of the safety thread 35 after the abutting tooth or stop face 65 of the complementary cam or ratchet 65 of the hollow pin 63 has contacted the coacting stop face 33 of the ratchet on the housing 33. In Fig. 12 it will be noted that the ratchet teeth 33 and 65 engage and that the coarse threads 35 are made up, whereas in Fig. 3 it will be observed that these threads are partially unscrewed and that the ratchet teeth are not engaged with the part 65. This part 65`may be integral with the pin 63, but for convenience in manufacture and assembly the part 65 may take the form of a separate ring which is welded to the pin 63 by welding in the circular space 66. The housing 33 is provided with an axial bore 36, and the central lportion of said bore is slightly reduced so as to provide a shoulder 31 therein. Attached to the lower end of the housing 33 is a pin 63 which has its upper end externally screwthreaded so as to correspond to and coact with the screw threads 35. Its lower end 39 is externally screw-threaded so as to receive a tool joint (not shown). The pin 63 is provided with an axial bore 46, and the upper end of said pin is screw-threaded at 4l so as to receive the clutch nipple 42. The outer surface of said clutch nipple is provided with a plurality of wedge cams ISS-U and 43L, and in the space between the rows of wedge cams 43-U and 43-L is a ball raceway 44-L (Figs. 12 and 13). Another ball raceway Ml-U is located above cams 43-U. Surrounding the clutch nipple 42, and extending upwardly, is a slidable sleeve 45 which snugly engages the inner surface of the member 33, and is movable within the bore 36. The lower end of said sleeve 45 is provided with a plurality of openings and confined within said openings are locking balls 62. The hollow sleeve 45 is circumferentially grooved so as to receive a packing ring 49-U. The sleeve 45 movably engages the upper surface of the enlarged part of the bore 36, and is provided with a shoulder 50 which corresponds to and coacts with the shoulder 3l of the housing 33. The upper end 6l of the sleeve 45 provides a piston head and is externally grooved to receive a second packing ring 49-L which is insertable therein. A slidable ring 54 overlies the top of the clutch nipple 42 and engages same when 45 moves downwardly.

The lower beveled edge of the ring 54 acts as a ball retainer for the balls 62 when the safety threads 35 are released. The coil spring 53 is confined above by the reduced bore of piston head 6I' and below by ring 54.

One or more, preferablyl several, of these safety joints generally indicated by A, Fig. 17, may be inserted, as indicated above, at short intervals in that part of a string of pipe or of tubes that later in use may become lodged or stuck in a bore. A suitable number of these joints are assembled with variously tensioned springs in each of the joints, and the joints may be made up into a string of pipe in such a manner that the joint at I the bottom will have the weakest spring 58, and

the next joint above in the string will be the next weakest and will increase the tension so that the top joint will have the strongest spring 58.

When the rst joint is made up in a string and before thel fluid pressure within isy higher 5.1 l than-without this joint, and when such pressure has not become so great as to compress the springs 58'by forcing the sleeve 45 downwardly, then the springs 58-will urge Ithe sleeve 45 upwardly until the top of the piston head 6| will bear `upwardly against the lower end of the pin 34': In this elevated position of the sleeve 45, the locking balls 62 will also be elevated, and will-be engaged in the lupper row of clutch cams 43-'-U soas to prevent reverse rotation to unscrew the safety threads 35. When the surface pump is running so as to remove the cuttings from the bit, as in drilling, then the diiferences in pressure rbetween the inside and outside of the joint will be so great as to compress the springs 58 in `all the safety joints, and then the sleeve 45 will be forced'down until the shoulder 50 of said sleeve is resting on the shoulder 31 of the housing 33; said locking balls 62 will also be lowered and will be in engagement with the lower row of the pumps until the inside pressure is sufficiently greater than the -outside pressure at this particular joint to partially move the sleeve 45 downwardly until the locking balls move into the lower ball raceway 44-L. With the parts in this position, the safety joint can be slightly rotated in a reverse or counterclockwise direction as seen from the top of the well, and will be partially unlocked to such an extent that now the upper part of the joint can be turned in a reverse direction until the locking balls B2, along with the sleeve 45 and the upper part of the joint, have been relatively elevated up far enough so that the locking balls will be forced up into the upper row of clutch cams and will prevent, for the time, any further reverse rotation. The pump is stopped or the fluid pressure within the joint is released, which will then permit the spring 58 to expand upwardly to lift the sleeve 45 and move the locking balls 62 to above the upper row of clutch cams 43, at which time the upper part of the joint may be further rotated in a counterclockwise direction until the threads 35 are completely unscrewed, and at such time the joint will have been released so that everything above pin 63 can then be withdrawn from the well. However, if for any reason it was found desirable to reconnect the joint, it could be done without coming out of the well to reset any of the,

parts thereof. Also, it will be seen that all three of the packings and all parts of the joint are removed from the lower portion of the joint, except the lower portion 63 of the joint which is left in the well. It will be observed that because it is necessary-not only to have an intermediate fluid pressure to operate the locking means, but that it is necessary to operate with a number of variations in pressure as described above, it might be said that the lock is a combination lock and substantially all possibilities of the joint becoming unlocked and released during normal operations in a bore hole are eliminated, Also, it will be seen that such a safety joint is very strong, and that it is no longer necessary, to lose any of the parts of the lock or packings at any time.

Circulation breakers As pointed out .hereinbefora some type of Cil circulating breaker or by-pass valve device. would be desirable to be placed in astring of drill stem, orA of other tubing, when the same is run into a well bore, and, in the event such pipe became stuck within the well bore, it may be possible to freesaid pipe by operating said circulating breakers.- In Figs. 1 to 8, inclusive, there has been shown one type of a circulating breaker. .The circulation breaker is preferably of the same inside and outside diameters as the inside and outside of the tubing and therefore does not produce a reduction or an enlargement within the string. The upper end 40| of the housing 400 is internally screw-threaded, and receives an adapter 402 which has an axial bore 403 therein. This adapter 402, at its upper end, is connected to a section of the drill-stem or tubing. The lower inner portion of said adapter is enlarged and forms a shoulder 404. The lower end of the housling 400 is reduced and externally screw-threaded, forming a pin 405 onto which a safety joint, for

example the one shown in Fig. l2, a tool joint box (not shown) or the collar of any ordinary tubing (not shown) may be connected. The- !housing 400 is provided with an axial bore 406 which is reduced at its lower end and forms an annular shoulder 401. This housing is provided with fluid passageways (to be later described),

and the valves (to be later described) for said passageways are controllable to be opened and closed by the operator from without the Well bore. Preferably, the operator will desire to openv and close one of said valves before opening another of said valves in a circulation breaker at some lower Vlevel in the well bore so as to establish circulation by short stages, but it is not intended to limit the method of operation at all times to short stages or to opening and closing the passageway in one circulation breaker before opening the passageway in another circulation breaker.

Slidable within the bore 406, of the housing 400, is a. valve control 408' used to position a valve, which control includes an elongate sectional sleeve 408. The upper section 409, of the sleeve 400, is screw-threadedly attached to the upper end of the lower section 4I0. The extreme upper end of the section 409 slides within the enlarged portion 'of the adapter 402, so as to abut the annular shoulder 404. A plurality of slots 4H are provided in the upper end of said section, and normally have their outer surfaces closed by the adapter 402 as shown in Fig. 1. It is pointed out that said slots are cut at an upwardly extending angle so that fluid passing through said slots must travel in an upward direction. Below the slots 4H, the outer circumference of the sleeve is provided with a spiral groove 4t2, said spiral portion of the sleevev 409 being enlarged and sliding within the bore 406 of the housing 400. The section 4I0 is connected at a point opposite the spiral groove, or in close proximity thereto. v

The housing 400 is provided with a plurality of openings or fluid passageways 4I3 which establish communication between the interior and exterior of said housing. Slidable within the bore 406, of the housing 400, and confined between said housing and the section 4I0 is a sleeve 4|4 which has its upper end enlarged and slidably engaging both the section 4l0 and the housing 400. The central portion of the sleeve 4|4 is provided with slots 4|5, and said sleeve at this portion is reduced. Projecting within'the sleeve 4|4, and screw-threadedly attached to the housing 400 is a stop pin 416, which willobjviouslyflimiathe,vertical movement-of the sleeve.

41.41. because the; inner end-1 of` saidpin projects withintheslot. 415. Belowv the slots 415, the sleeve.4.l4lis. providedl with aplurality of a pair of annular grooves, 4H. The section 4l0, of the sleeve 408K,l hasitsl outer circumference reduced, forming. an annular seat or shoulder 4I8.

A retaining Aring 418 normally abuts the shoulf der 4|;8 and the lower end of the sleeve 4|4. A similar retainingringy 420` normally rests upon the shoulder 401, ofthe housing 400, and on theA annular seatabove the lower end 42| of the section- 4,:I0. Confined between said retaining rings is, a, coiled, compressed spring 422. The

upper enlarged portion 423 is provided with av plurality ofA packing rings 424 which normally liefoneither side' of the openings 4|3, thereby packinggoff so; thatr fluid cannot enter or escape through` the .openings 4l3` Confined between the lower end of the section 409 and the` enlarged portion423 of sleeve 4I4 is a coil spring 425. In the inner surface of the housing 400, and opposi-tethe coil spring- 425, there is provided a plurality of enlarged screw threads 426. The section 4I0 of the sleeve 408, near its lower portion, is. provided with aplurality of openings 421, and movably; conned within said openings are balls 428 which ordinarily` abut thel partition between thel two. annular grooves 4H and 411'.

It, is PDinted out that the circulation breaker assembly is.in the position shown in Fig. 1 when it isinserted in the well, and remains in this position during normal operations of the well. However, any means, such` as the member C, a core barrel, or the like, (not shown) may be run into the well and will strikethe balls 428. The core'barrel, or the like, by its own weight or by normal pump pressure, will force the sleeve 408 downwardly, and the balls 428 will drop into the lower circular groove 4I'I, thereby allowing the core bar-rel.y or other tool to pass through said circulation breaker. When said core barrel, or other tool-is'withdrawm it strikes the balls 428, movingfthe sleeve 408.upwardly and allowing the balls;` to-E snap intotheupper groove 4I1', and the toolmay then pass up. through said circulation breaker. Y

In the event cuttings or other materials lodge around; the pipe, and the pipe becomes stuck in the'well, it is. desirable to break normal circulation Inaccordance withmy invention, there may be ,f

placed. atanyvsuitable intervals within the string ofI pipe orF tubing, circulation breakers generally indicatedby-B, Fig, 17.. For example, the depth ofthe well` may be 5,000 feet, andy one of such circulating breakerscould be placed at. five-hun'- dred-vfoot.intervalssovthat there would be five to eight of such circulation breakersin the string of pipe; If.y while drillingl the pipevb'ecomes stuck, the-operator usually in such instances does not desire to=disconnect the pipe if he can reestablish circulation around, the same, thereby freeing it. Anl exampleof the methodtooperate the circulation breaker is to open. and close the valves 409, 428=in one or more of these breakers so as to re-4 establish-circulation. There has been shown in the. drawingsa member C which is commonly referred`y to. as a go-devil. As the go-devil strikes the first .circulation breaker and comes to rest upon the balls 428 its weight is just enough to-move'theparts tothe positionsI shown in Fig. 2, lthereby ymovingI the sleeve 408' downwardly until the. spiral. groovev 4I2` is opposite= the screw-v threadedl portion 426;l ofv the housing 400.y The.

purpose ofthe spiral groove 4l2 and threads, 426 isto set upa turbulence in the fluid stream that may be forced to iiow out through the openings 453, .and thereby create an extra down thruston the sleeve 408 by impinging upon the grooves 4|2. This down thrust will be slight unless the volume,- and rate of flow of the uid stream is high as it will be when the cuttings are, circulated out of the well above the open passageways4l3. The. screw-threaded portion 426 and the groove 4t2 will then create a greater turbulent eiiect and will act to force said sleeve 408 downwardly. Further,v in the event particles of mud or the like, enter the slots 4I l, they will be carried down and aroundv the spiralgrooves and threads. The spring, 425.

will move the enlarged-portion 423 of the sleeve 4i4 downwardly as the pressure upon the spiral grooves 412 is increased. All this will move, the ring 4l9 downwardly and compress the spring 422. The circulation breaker will now be in the position shown in Fig. 2.

The ports 413 have now been openedv and thereby fluid may pass from the bore offthe tubingy through the slots 4H and through theannular grove 412 and threadsV 426, out throughl the ports 4i3 and up thev outside of thev pipe or tubing. Thus the operator has established'circulation around this upper portion of the stuck pipe, and he may now desire tomove to the next circulation breaker to. establish communication at that point. In order todo this, itis necessary to increase the pump pressure and volume which will act upon thesleeve 408, thereby moving said sleeve downwardly and allowing the balls 428 to move into the lower groove4l'l, as shown in Fig. 6. The lower shoulder of enlarged portion 423 is resting upon the pin 4l5 (Fig. 2) and therefore the sleeve [H4v cannot beV movedl down further. Thus the sleeve 408 will move downwardly, allowing the go-devil C to pass. through the upper circulation breaker. The go-devil Cv is moved by, gravity down through the uid to the next circulation breaker, and the steps are repeated until circulation has been established down to the second breaker, and-l this is repeated until the entire string of tubing has been freed. After thel go-devil or a tool has passed through a circulation breaker, the springs 422 and 425 expand and return the parts to the position shown in Fig. l and the valve closes the passageways 4I3. In some. instances, it may bev found desirable to.v operate the valve in theY breaker by other means, and anyv suitable means may be used. At times it is desirable to retract saidgof-devil or to run into the well or to remove from the well a core barrel or other device. device, is pulled upwardly, the same will strike ai the balls 428, and, by an upward movement,

the pin 4l6 willA holdthe sleeve 414 andA allow the sleeve 408 to move; upwardly, thereby allowing the balls.` 4281 to dropA into the upper groove 4H and allow said go-devilto be retracted (Fig. '7).

' Thus there is provideda circulation breaker or by-pass valve device which does not restrict the bore ofthe tubing and which can be easily and efficiently operated'.

Another form ofthe circulation device is shown in Figs. 9, 10 and 11'. The numeral-450 designates a sectional tubular housing. The upper portion t of said housing has its upper end internally screw-threaded and its lower portion reduced and externally screw-threaded. The lower portion 452 of saidhousing isscrew-threadedlyattached to A's the go-devil, or other the-lower end oi' the portion 45|, and the lower end of the portion 452 is reduced and externally screw-threaded so that=a tubular pipe 453 may be attached thereto. It is pointed out that a tubular pipe 454 may be attached to the upper end of `the portion 45| of the housing 450. Thus the housing may be connected into a string of tubing.

The portion 45| of the housing is provided with .I anaxial bore 455. yA plurality of ratchet teeth 456 are provided on the walls of said bore. An annulary seat 451 is provided on the lower portion of the lower end of the housing 45| surrounding the bore 455. 'Ihe housing 452 is provided with f an axial bore 458 therein, the bore is enlarged at 459 and further enlarged at 460 at the upper endv of the portion 452. A valve head 46| has a valve face 462 on its upper periphery and seats upon the valve seats 4 51 located on the lower end ci' the housing 45|. A sleeve 463 depends from 'Y saidvalve Vhead and has its lower end extending' into the enlarged bore 459. The head and sleeve have an-axialbore ,464 extending therethrough. The`head'46| slid'ablewithin the enlarged bore 460, -while the sleeve 463fis slidable within vthe 4 bore 459. A coiled spring 465 surrounds the sleevev establishvcommunication between the enlarged borer460 and the exterior of the housing r451.. A disk 461 is disposed above the head 46| and has an axial opening 468 therethrough. Said disk is provided'with a plurality of upwardly-extending, ilexible flngers 469 which have their uppermost ends 410 bent outwardly so that they may engage within the ratchet teeth 456. Thus the spring 465 will support the head and will close the valve seats 451 and 462 so that any iluid passed through the device must flow through the sleeve 463.

In operation` the bore of the device is unrestricted so that any tool may be passed therethrough. In the event the string of tubing becomes lodged or stuck in the well bore and it is desirable to attempt to establish circulation around said pipe, it is only necessary to drop or run into the well bore a suitable tool to close the bore of the sleeve 463. In the drawings, a ball 41| has been shown, however, a go-devil or the like may be dropped or run in or a wire line so as to close said bore. With the bore closed, pump pressure is applied to said disk and plugging means and the disk and head are moved downwardly. It is pointed out that when the disk is. moved downwardly, the lingers will also move downwardly, and the upper bent ends of said fingers engaging the teeth 456 will hold the disk in that position (Fig. so that the spring cannot move the head upwardly. The washing iluid is free to pass between the iingers and into the bore 460 and out through the orifice 466, thus washing the exterior of the pipe. It is pointed out that said fingers and teeth may be left out of said structure and in this instance the pressure oi' the iiuid may be depended upon to hold said head in its downward or ajar position.

This application is a division of my co-pending application, Serial No. 334,947, filed May 13, 1940, now Patent No. 2,394,759, granted February 12, 1946, for Method of Recovering Elements From Well Bores.

-Otherl modes of applying theprinciple of my f invention may be employed instead of theone explained, change being made as regards the mechanism herein disclosed, providedthe means stated by any of the following claimsr or the equivalent of suchy stated means be employed.

I therefore particularly point out and distinctly claim as my invention:

l. In a device for use in establishing partial circulation in a well bore, the combination including a tubular body, a passageway in the Wall of said body, a sleeve valve for the passageway slidably mounted in said body, means to move said valve to a position opening said passageway and means to normally urge the sleeve valve into position closing-said passageway during normal operations, said rst means vincluding a sleeve H mounted within said valve and extending thereabove, interconnecting means between said valve andsaid sleeve, and memberscarried bysaid sleeve and projectinggin-to the bore of-said-sleeve,

\ said sleeveV being spaced Afrornsaid body -above said valve to form-.a uid passageway.

f v2. In a'by-pass valvepdevice,thecombination .25

comprising a housing, por-ts in lsaid housing, a

-sleeve valve slidably mounted -insaid-housing being spaced from said housing above said valve to forma fluid passageway, a spring mounted between the upper end of 'said sleeve valve and a spring seat on said sleeve, whereby downward movement of said sleeve causes downward movement .of said sleeve valve, and means carried sf said sleeve and projecting intothe bore of v .id sleeve for engagement with'a toolgfor mbvg said sleeve downwardly.

3. A by-pass valve device comprising a housing, ports in said housing, a sleeve valve slidably mounted in said housing normally covering said ports, a sleeve mounted within said sleeve valve, said sleeve extending above and below said sleeve valve, said sleeve being spaced from said housing vabove said valve to form a fluid passageway, a

spring mounted between the upper end of said sleeve valve and a spring seat on said sleeve, a second spring being mounted between a spring seat in said housing and a spring ring that jointly engages the lower edge of said sleeve valve and a shoulder on said sleeve, and means carried by said sleeve and projecting into the bore of said sleeve for engagement with a tool for moving said sleeve and valve.

4. In a by-pass valve device, the combination comprising a housing, ports in said housing, a sleeve valve slidably mounted in said housing normally covering said ports, a sleeve mounted within said sleeve valve, said sleeve being spaced from said housing above said valve to form a huid passageway, spring means mounted between said sleeve valve and said sleeve, the upper part of said sleeve being provided with slots that extend radially outward and upwardly.

5. In a by-pass valve device, the combination comprising a housing, ports in said housing, a

` comprising a housing, ports in said housing, a

sleeve valve slidably mounted in vsaid housing normally closing Vsaid ports, a sleeve mounted within said sleeve valve, said sleeve being spaced from said housing "above said valve to form a fluid passageway, spring means mounted between said sleeve valve and said sleeve, said sleeve having spiral grooves therein, such grooves being located adjacent the upper end of said sleeve, and upon the exterior surface thereof, said hous- 'ing having spiral grooves ltherein upon its interior surfaces, 'these last named grooves lying opposite 'to and cooperating With said rst named grooves when said ports are opened by said sleeve valve.

7. 'In a by-pass valve device, the combination comprising a housing, ports in said housing, a sleeve valve slidablymounted in said housing normally closing said ports, a sleeve mounted within Vsaid `sleeve valve, Vsaid sleeve being spaced from said housing above said valve to form a fluid passageway, spring means mounted between said sleeve valve and said sleeve and between said sleeve valve and said housing, grooves on the interlorsurface of said sleeve valve and membersA of lballs circumferentially mounted in said sleeve, said balls extending'rad'ially inward. and outward beyond the inner -and outer-surfaces oi saidfsleeve, and adapted 'to-be Jmovedl into said grooves.

9. In a bypass"valve device, the combination comprising an vrexterior housing, ports extending therethrough, a sleeve valve slidably engaging an interior surface of 'said housing, 'a sleeve mounted withincsaid sleeve valve, said sleeve being fspaced from said housing `above 'said valve to :form 'a iluid passageway, a 'spring mounted rbetween said housing and said vsleeve and below r-said sleeve valve and .normally urging said sleeve 'valve upwardly vinto a position that prevents :circulation between the bore of said housing land the exterior thereof through said ports.

kCHARLES R. EDWARDS.

REFERENCES CITED The following references are of record in the le of this patent:

lUNITED STATES PATENTS Edwards Feb. l22, 1949 

